5 STARS for working out of box. I use it for a voltage monitoring setup with another automatic switch for my sub pump system. Always make sure to keep an eye on it and to see the regularity of the under ground water removal system. So far its been running really smoothly and can be used as a turn off switch in emergency.I will update as time goes on.

Got this for the integrated energy tracking, which for me is its best feature. The wifi connectivity is fine, and handy for remote control and monitoring. I did not need to configure the automatic trip features to turn off the breaker, but am happy they are there for future use.

Easy to install and works as advertised

I bought the product to control the irrigation system motor and have a more precise control of the monthly electrical consumption regardless of the possibility of programming the on and off times. The experience has really been very good. The product connects to the application quickly, fluidly, easily and intuitively. The programming commands regarding the minimum and maximum voltage and current limits are extremely easy to configure. There are actually products from more recognized brands that do not work as well.I am an electrical engineer and I have tried quite a few products of this type. Regardless of that, I have a fairly complete home automation system at home. The information provided by the device is quite accurate. I have compared the information on the screen with calibrated instruments that I have placed on the same circuit: a multimeter to measure the voltage on the line and an ammeter clamp (both from the Fluke brand) to confirm the current consumption data in amps. Both measurements have turned out to be very, very coincident for a commercial device like this. In short, it does not have the best price in its category. There are actually cheaper products out there, but this is the one I've been able to testI use the Smart Life app, I don't exactly use "your app" there are many products from one app that are compatible with another and this is the case you can use it with either of these two apps I simply chose the first one because I have other devices already using this app (Smart Life)As nothing is perfect, there are always some problems that can be pointed out. In this case I find the difficulty that the panel doesn't have the possibility of being retro, illuminated and in certain circumstances. That is a drawback, another thing to keep in mind is the few possibilities that the app offers in terms of different types of timers. Programming is only allowed on certain days and at certain times, but it is quite limited, compared to other products that this same application handles and they have many different possibilities in the timersIf you have a "Samsung Smart things" account, it may be that, as in my case, this device specifically, does not appear in the list of devices that can be controlled from the Smart things application. This usually happens in some cases, since the interconnection between applications is apparently not perfectly compatible, unlike Alexa and Google Home, which in this case and with these two applications, you can control the on and off of the device, although you cannot access extended information (and that only from the original application) but control of the device is allowed, as well as other functions of timers and programmed routines without problemIn summary, I would recommend them perfectly. The product looks solid and has a medium-high quality-price ratioConcluding: -The Good: Fast, connection, easy configuration and reading accuracy-The not so good: The display is not backlit, useful but restricted timer setting-Do I recommend the purchase?: 100%

Very good sale

The OELFFOW Wi-Fi circuit breaker offers lots of ways to cut off power when parameters go outside set limits, and monitor power usage.Connection to Tuya Smart was easy and it is then available in Google/Alexa as a controllable switch.It monitors line voltage (0.1V precision), current draw (0.001A precision), watts (1W precision in real power, i.e. takes power factor into account), and leakage current to ground (1mA precision). It shows these values on the device screen as well.The limits can each be set to optionally trigger shutdown. Overvoltage, undervoltage (1V increments, must be at least 20V apart), overcurrent (1A increments), leakage to ground (1mA increments, 10mA minimum). The leakage is what triggers a GFCI, so basically this gives you that functionality with settable trip point. . Limits can be checked on the device screen but I couldn't change them (maybe once app is connected they must be set through app?).Overvoltage shuts the unit off and requires cutting power to the breaker itself before it can be cleared. Undervoltage turns back on once the voltage comes back up. Overcurrent requires manually turning back on in the app or on the unit.Limit conditions don't trigger any notifications from the app but via an Automation I got it to alert on any of the problem conditions (see screenshot).It has scheduling in the form of any number of events that turn it on or off at a set time on settable day(s) of the week.The breaker can be set to alert and shut off after a kWh limit is reached. It can be "recharged" with more, keeping track of the balance of kWh left. This works like prepaid phone service where you buy minutes then use them up.Power usage can be shown in the app as graphs for days, weeks, and months. It CANNOT be exported as a spreadsheet to analyze on a PC, unfortunately.There is an event log of when the unit was turned on and off, and a separate log of any alarm conditions.The breaker correctly reports a power outage to the app. It apparently has some capacitors inside to keep it powered for a second after power loss so it can send the message to the cloud before it loses all power. It doesn't just report as offline after a power outage.Internally it uses beefy copper braid from input to output (see photos). It all holds in place in the case, it's not flopping around as in the photos. It looks like it measures energy usage via the copper strip (with multiple sample points to measure voltage drop). Then for leakage it uses a toroid transformer around both lines. The relay controls just the live side. I couldn't see any branding on the relay.